HTML codes showing in viewpage HTML data

[eluser]mi6crazyheart[/eluser]
Hello Guys,
I'm a new to CI. Just using it in my project from last 2 months. I've a comment section in my project. Where any one can give comments. Every things are going perfect but when ever any one putting HTML content(image/videos) & then when those are showing back in the comment section... direct HTML codes are showing in the comment page rather than HTML content(image/videos).

ex: when i'm saving any "embed youtube video code" in the comment box & save that the out put comes as "raw Embed Video codes" rather than Youtube Video.....

I feel like it must be a minor thing but really can't understand where the fault has occurring. Plz, if any body have the solution reply me back as soon as possible.